Solution?Port multiplier version: extend 9 pin USB 2.0 port to 4x 9 pin USB 2.0 ports;Prevent short circuit outlet design. To prevent accidental removal of circuit board, pins and case the risk of short circuit Connector?Connector A: 9 pin USB 2.0 male, connector B: 4x 9 pin USB 2.0 female; Parameter?Cable Length:12in(30cm)PCB Demension(L-W): 1.96in*0.98in(5cm-2.5cm) Foam Tape?USB 2.0 splitter with double sided foam tape, it is available to fix on the main board or chassis. Note?Both of PCB boards could be divided into single board. Please do not worry about using when the item you received is 2pcs single boards;